Education: Cataloguing Babel

In what languages does the modern world speak? Classifying the world's
tongues has been the task for the past seven months of a bleary-eyed
crew of linguists at Washington, D.C.'s George Washington University.
They can still only guess at the number of existing languages:
somewhere between 3,000 and 6,000. But the significant languagesthat
is, those that are the mother tongues of at least 1,000,000 of the
world's 2.9 billion peoplenumber only 130. The top dozen, and the
number of people who speak them: